The UFC gave a backstage look at Georges St-Pierre's win over Nick Diaz at UFC 158, complete with an adorable shot at the end of GSP high-fiving a young fan who was dressed like the champ from head to toe.

According the GSP's trainer, Firas Zahabi, it's a fight the UFC welterweight champion went through with despite an injury. Zahabi said GSP injured his Achilles tendon during training for the fight, and it may have worsened during the bout.

"I was worried it would tear during the fight," Zahabi told MMAFighting.com. "We had to cut his last sparring [session] short due to his injury. He had a week to rest it and then the fight."

Does finding out that GSP was injured changed your opinion of his performance? Speak up in the comments, on Facebook or on Twitter.